Drill.



No. 670,543. Patenfed Mar. 26, |90'|.`

I H. PAULSUN.

DRILL.

(Appliation me@ 'uw s, 1900.

(No Model.)

UNITED STATES PATENT EEICE.

HANS lPAULSON, OF TAOOMA, WASHINGTON, ASSIGNOR OF ONE-HALF TO HERMANKLABER, OF SAME PLACE.

DRILL.

SPECIFICATION forming part Of Letters Patent No. 670,543, dated March26, 1901.

Application led March 9, 1900. Serial No. 8,053. iNo model.)

To all whom t may concern,.-

Be it known that I, HANS PAULSON, a citizen of the United States,residing at Tacoma, in the county of Pierce and State of Washington,have invented a new and useful Drill, of which the following is aspecification.

This invention relates to drills in general, and more particularly tohand-drills, although the principles involved may be employed inconnection with power-drills, as will be readily understood.

The object of the invention is to provide a construction including adrill-shaft and hammer so connected that when the hammer isreciprocatedwith respect to the shaft it will Iirst deliver a blow tothe shaft to drive the drill and will then shift the drill rotatably,ready for a second stroke.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is a view, partly in section and partly in elevation, showingthe hammerV resting upon the upper end ofthe drill-shaft.

A, Fig. 2 is an enlarged section showing a portion of the drill-shaftand the guide-fingers and ratchet mechanism thereon. Fig. 3 is a sectionon line 3 3 of Fig. 1 looking upwardly.

Referring now to the drawings, the present drill comprises a tubularbody portion 5, having its upper end interiorly threaded forengagementby the threads of a hammerhead 6, while the exterior of the upper end ofthe body is also threaded for engagement by the interior threads of acollar 7, having radiallyextending lugs 8. Through these lugs 8 areformed perforations which receive bolts 9, which engage a handle 10.This handle 10 is disposed above and radially of the tubular body and isheld spaced from the lugs 8 by flanges upon the bolts, which engage thelugs and the handle.

In the inner face of the tubular body portion are cut two helicalchannels or grooves 12 and 13,` which extendl throughout the length ofthe body portion and through the lower end thereof at diametricallyopposite points. In connection with this tubular body portion there isemployed a rotatable drillshaft 15, the lower end of whichis providedwith a socket 16 of any preferred construction, and which socket isadapted to receive and hold a drill. The drill-shaft is disposed withinthe tubular body 5 and in a position to be engaged at its upper end bythe hammer-head 6. In order to retain the drillshaft in the properposition concentric with the tubular body and to shift the shaftrotatably after each stroke of the hammer, the central portion of thedrill-shaft is enlarged and threaded, as shown at 17. Upon this threadedportion 17 is engaged a collar comprising a major upper portion 18 and aminorlower portion 19, both of which are cylindrical. Upon the minorportion 19is rotatably lnounted a disk 20, having lugs 2l extendingradially therefrom at diametrically opposite points of its periphery,and which lugs engage the grooves 12 and 13, respectively, the diameterof the disk being such as to cause it to fit snugly within the tubularbody.

Below the collar upon the drill-shaft is disposed a disk 23, having aperipheral ratchet 24, this ratchet-disk lying closely against the endofv the minor portion 19 of the collar to hold the disk 2O thereon. Thedisk 23 has its lower portion reduced and formed cross-sec tionallyangular for the reception of a wrench in the application and removal ofthe ratchetdisk.

In order to lock the disk 20 to move with the drill-shaft in onedirection and permit the drill-shaft to move freely thereof in anopposite direction, a pawl 25 is pivoted upon the disk 2O in a positionto engage the ratchetteeth' 24: of disk 23, and 'to hold the ratchetyieldablyin this engagement a spring-finger 27 is engaged at one endwith a pin 28 upon the disk 2O and is thenpassed between a sec-A IOOraised, and as it ascends the lugs 21 move downwardly through the slotsor grooves 12 and 13 and are caused to progress helically of the body.At this time the pawl 25 engages the teeth 2l of the ratchet-disk 20,and this helical movement ot' the disk with respect to the body 5imparts rotary motion to the drillshaft, as will be understood. Thisrotary motion will continue until the body has been raised to the properheight. When the body 5 is then lowered, it will cause a reversemovement of the disk 20; but with this movement the ratchet 25 will ridefreely over the ratchet-teeth, and the drill-shaft will have no movementdue to the frictional engagement of the drill with the body operatedupon. By moving the body downwardly with a quick motion a sharp strokeor blow will be delivered by the hammer-head 6 upon the upper end of thedrill-shaft, and this blow will be imparted to the drill to drive it.

It will of course be understood that the body may be raised to anyheight within certain limits and may be lowered with such speed as willsecure the best results under different circumstances.

In the manufacture of the drill the specific construction shown may bealtered and any suitable materials and proportions may be used for thevarious parts without departing from the spirit of the invention.

`It will be noted that the collar 7 is in the form of a cap for theupper end of the body 5 and that this cap has a central perforation,through which an axial stem 35 of the hammer-head 6 extends. This stemhas dattened sides, as shown, for the reception of a wrench. In practicethe hammer-head is first screwed into the body 5, and the cap 7is thenscrewed into place, after which a wrench is engaged with the stem 35,and it is backed up until the head rests against the cap. In this arofthe cap and parts carried thereby is delivered directly to thedrill-shaft, and strain upon the threads is prevented.

l. A drill comprising a tubular casing having interior helical grooves,adrill-shaftpassed into the casing axially thereof and with respect towhich the casing is reciprocatory, a hammer-head carried by the casingtor engagement with the drill-shaft to drive the drill when the casingis moved in one direction, a disk mounted upon the drill-shaft andhaving lugs engaged with the grooves of the casing, and ratchetconnections between the disk and shaft, whereby the shaft will berotated step by step upon return movement of the casing after striking ablow.

2. A drill comorising a tubular casing having interior threads, ahammer-head inserted in the casing and engaged with said threads, saidhead having a cross-sectionally angular stem projecting beyond the endof the casing, a cap having threaded engagement with the exteriorot' thecasing and having an opening through which the stem of the hammerheadprojects, whereby a wrench may be engaged with the stein to back thehead against the cap and jam the parts to prevent unscrewing, handlesconnected with the cap, a drillshaft slidably disposed within the casingfor engagement by the hammer-head as the casing is moved in onedirection with respect to the shaft, and connections between the shaftand casing to rotate the shaft upon return movement of the casing.

In testimony that I claim the foregoing as my own I have hereto afxed mysignature in the presence of two witnesses.

HANS PAULSON.

Witnesses:

I-I. B. RITZ, MABEL MCGUIGAN.

